FERGUSON, Mo. (AP) - The hacker group Anonymous has released the name of the person that it says is the officer who shot and killed 18-year-old Michael Brown in Ferguson, Missouri.

The Associated Press has not been able to verify the name. Police and prosecutors have declined to name the officer, citing concerns that his life, and the lives of his relatives, could be endangered if his identity is made public.

The fatal shooting of Brown by a white Ferguson police officer on Saturday has sparked protests in the St. Louis suburb. Some have turned violent.

On Wednesday night, police in riot gear again used tear gas to disperse protesters after some threw explosive devices and rocks at officers.

St. Louis County police and the FBI are investigating the shooting. County prosecutor Bob McCulloch said Wednesday that it could be several weeks before the investigation wraps up and authorities decide whether to charge the officer.

Brown was shot Saturday following a confrontation with the officer. Friends and relatives say he was doing nothing wrong.

Civil rights activist Al Sharpton is calling on the Department of Justice to monitor how police are responding to protesters.

Members of Sharpton's National Action Network and local civil rights leaders are scheduled to meet Thursday with Ferguson police to discuss the police response.

Sharpton says he spoke with St. Louis County Police Chief John Belmar by phone to express his outrage at how the police responded to the protests.

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